Enclosure for air conditioners and the like

ABSTRACT

An enclosure for through-the-wall or window type airconditioners which may include additional heating and/or humidifying means. The enclosure consists of a one-piece, molded housing or chassis for supporting the various functional elements of the unit and a top and front cover. Centrally of the chassis is a firewall which extends between a pair of laterally spaced side walls intermediate the ends thereof. Suitable mounts are provided on opposite sides of the firewall for the condenser, compressor, evaporator, and other components. Portions of the blower housings may be molded integral with or separate from the chassis and provided with suitable mounts for the evaporator fan motor. Evaporator drain pan areas molded as part of the blower housings provide fast runoff of the condensate from the evaporator. A fan motor support, channelled water pan and lower portion of the fan shroud may be molded integral with the floor member of the chassis. The upper portion of the fan shroud is molded integral with the top cover. Such an enclosure greatly reduces the number of elements heretofore required for window or through-the-wall air-conditioning housing, thus simplifying the manufacturing procedures and reducing the overall size of units of this type, and eliminating the need for decorative covers previously required.

United States Patent [191. Nenadal ENCLOSURE FOR AIR-CONDITIONERS ANDTHE LIKE [75] Inventor: Clarence G. Nenadal, North Kingsville, Ohio [73]Assignee: Premix, Inc., North Kingsville, Ohio [22] Filed: Aug. 9, 1971[21] Appl. No.: 170,011

[52] US. Cl 165/48, 62/262, 98/94 A, 165/65 [51] Int. Cl. F25d 23/08[58] Field of Search 62/262; 165/48, 76, 165/65; 312/101; 98/94, 94 AC[56] References Cited I UNITED STATES PATENTS 2,751,760 6/1956 Williams,Jr. 62/262 X 2,804,758 9/1957 Smith et al..... 62/262 X 2,952,997 9/1960Mullin 62/262 X 2,290,973 7/1942 Jewell 62/262 X 2,250,978 7/1941Weiland et a1. 62/262 X 3,200,608 8/1965 Glickman.... 62/262 2,780,9292/1957 Roseman 62/262 2,884,228 4/1959 Jorgensen 165/65 PrimaryExaminer-Manuel A. Antonakas Att0rneyDonnelly, Maky, Renner & Otto June26, 1973 [57] ABSTRACT An enclosure for through-the-wall or window typeairconditioners which may include additional heating and /or humidifyingmeans. The enclosure consists of a onepiece, molded housing or chassisfor supporting the various functional elements of the unit and a top.and front cover. Centrally of the chassis is a firewall which extendsbetween a pair of laterally spaced side walls intermediate the endsthereof. Suitable mounts are provided on opposite sides of the firewallfor the condenser, compressor, evaporator, and other components.Portions of the blower housings may be molded integral with or separatefrom the chassis and provided with suitable mounts for the evaporatorfan motor. Evaporator drain pan areas molded as part of the blowerhousings provide fast runoff of the condensate from the evaporator. Afan motor support, channelled water pan and lower portion of the fanshroud may be molded integral with the floor member of the chassis. Theupper portion of the fan shroud is molded integral with the top cover.Such an enclosure greatly reduces the number of elements heretoforerequired for window or through-the-wall air-conditioning housing, thussimplifying the manufacturing procedures and reducing the overall sizeof units of this type, and eliminating the need for decorative coverspreviously required.

16 Claims, 6 Drawing Figures PAIENIEDJms 191s sum 1 OF 3 INVENTOR.CLARENCE 6. NE/VADAL ATTORNEYS ENCLOSURE FOR AIR-CONDITIONERS AND THELIKE BACKGROUND OF THE INVENTION This invention relates generally asindicated to enclosures, particularly for through-the-wall or windowairconditioners which may but need not necessarily include additionalheating and/or humidifying means.

Through-the-wall and window air-conditioners and the like are widelyused in residential and commercial buildings because of theirflexibility in providing airconditioning for individual rooms and alsobecause they are easily installed and maintained. Such units usuallyinclude conventional air-conditioning components such as blowers forcirculating air between the room and air-conditioner, a coolantevaporator for cooling the room air, a compressor and condenser, acooling fan for the condenser, an electrical control console, a drainpan, and assocaited mechanical and electrical equipment including motorsfor the blower and fan.

Usually, the various components are supported on and within a sheetmetal assembly or housing consisting of eight to. or more separatecomponents, including a main chassis which essentially consists of avertical wall, known generally as a firewall, and a horizontal base orfloor. To the main chassis are affixed two side panels and a top andfront panel which form an enclosure separated by thefirewall-providing'a rear section for the compressor, condenser and fanunits, and a forward section for the blowers, evaporator, and electricalcomponents. The side panels and top panels usually have angle membersaffixed to their outer surfaces which present flat vertical facesbetween which polyfoam or other compressible materials to provide a sealtherebetween.

Supported within the enclosure defined by the sheet metal assembly arethe various functional components of the unit including an enclosure forthe electrical control box, housings for the blowers, a shroud for thefan,

and a drip pan, all of which are either attached to the floor, to thefirewall, or to the side panels byv conventional connectors. Inaddition, the entire forward part of the air-conditioner unit whichextends into the room is normally enclosed within a further sheet metalenclosure including front and side panels and a top panel having louversor other means to control the flow of cooled air from theair-conditioner to the room.

The problems inherent in manufacturing throughthe-wall air-conditionersof conventional design are numerous, not the least of which is thenecessity of having to separately order and maintain inventories of thevarious sheet metal assembly or housing components. This places a. heavydrain on working capital, and also requires additional storage spacewhich could otherwise be used for manufacturing purposes. In addition,the several components of the conventional sheet metal assemblies orhousings are oftentimes manufactured by different organizations withdifferent delivery times and different product and finishingspecifications and tolerances, resulting in many interruptions anddelays. Moreover, because of the large number of components that make upconventional sheet metal assemblies, more labor is required to assemblethe air-conditioners, and it is more difficult to maintain them. Themany components of the assemblies also add to the weight of the units,increasing their shipping weight in cost, and

maybe disposed also usually detract from the aesthetics of the finishedunits.

SUMMARY OF THE INVENTION With the foregoing in mind, it is a principalobject of this invention to provide a novel, more simplified enclosureboth structurally and functionally for the various assembled componentsof through-the-wall or window air-conditioners.

It is another object to provide such an enclosure which includes lessparts than conventional airconditioner housings and is less expensive tomanufacture.

Still another object is to provide an enclosure for airconditioners andthe like which requires less labor to assemble, is lighter in weight,and is more aesthetically attractive than the housings previously used.

Yet another object is to provide a completely corrosion resistantenclosure which eliminates the problems encountered in the fieldrelative to disintegration, rusting, and stains created on buildings asa result of rust and the like of conventional metal air-conditionerhousings. i

Still another object is to provide such an enclosure which eliminatesthe need for additional drain pans and conditioner or the like 'in theform 'of a one-piece molded chassis having a top cover and front coverattached to the top and forward edge, respectively,of thechassisproviding ,a housing for thevarious components of theair-conditioner, including the blowers, fans, electrical controlassembly, evaporator, condenser, motors, and other associated electricaland mechanical components. The chassis, which is desirably molded as onepiece as aforesaid, includes a pair of side walls connected together" bya firewall intermediate the ends thereof and a floor member on one sideof the firewall. On the other sideof the firewall there are blowerhousings and drain pans for the evaporator which may be integral with orseparately attached to the chassis as desired. Such a one-piece chassisreplaces the conventional multi-piece metal housings which include aseparate firewall, base and side panels.

In addition to the foregoing, the side walls for' the chassis of thepresent invention forwardly of the firewall are desirably stepped sothat they extend laterally outwardly from and vertically along the sidesof the chassis to permit abutting and sealed engagement of the chassisagainst a sleeve positioned within a wall opening. The stepped portions,which are integral with the chassis, replace the angle members ofconventional units which run along the sides of the chassis.

The blower housings of the present invention desirably include upper andlower halves, of which the upper halves are desirably integralwith theforward face of the firewall and one of the side walls and also with aninterior wall which extends forwardly from the firewallspaced inwardlyfrom and parallel to the other side wall. Formed in the upper surfacesof-the upper blower housing halves are air discharge openings. Ahorizontal suspension platform for the blower motor integrally connectsthe upper blower housing halves together and cooperates with the upperblower housing halves to provide evaporator drain pan areas surroundingeach of the air discharge openings. The motor for driving the airblowers is suspended vertically beneath the suspension platform and isreadily accessible from the front of the air-conditioner.

Suitable evaporator mounting brackets may be molded or attached tomounting bosses adjacent the ends of the upper blower housing halves formounting the coolant evaporator above the blowers and drain pan area.Optionally, additional heating means in the form of electrical or steamheating coils and/or humidifying means may also be included in suchunits if desired. The upper edge of the interior wall is sloped at anangle to provide a clearance space beneath the evaporator for the wiresfor the various electrical components.

The floor member also includes raised bosses for mounting of thecompressor motor, an elevated support station for the condenser fanmotor, and channels which collect the evaporator and condenser water foreasy pickup and distribution by the condenser fan to improve theoperational efficiency of the unit. Rearwardly of the elevated supportstation is the lower half of a fan cowling which is also desirablyintegral with the floor member. The upper half of the fan cowling isintegral with the topvcover which is a one-piece, generally rectangularelement, sized and adapted to lie upon and be affixed to the forwardedge of the body.

To the accomplishment of the foregoing and related ends, the invention,then, comprises the features hereinafter fully described andparticularly pointed out in the claims, the following description andthe annexed drawings setting forth in detail a certain illustrativeembodiment of the invention, this being indicative, however, of but oneof the various ways in which the princi-- In the annexed drawings:

FIG. 1 is an exploded perspective view showing the various parts of theair-conditioner enclosure of the subject invention and the majorfunctional components of the air-conditioner in disassembled form;

FIG. 2 is a top plan view of the assembled unit of the subject inventionshown installed within a wall opening;

FIG. 3 is an enlarged vertical transverse section through the assembledunit of FIG. 2, taken on the plane of the line 33 thereof;

FIG. 4 is a longitudinal section through the assembled unit of FIG. 3,taken on the plane of the line 4-4 thereof;

FIG. 5 is a fragmentary transverse section through the assembled unit ofFIG. 4, taken on the plane of the line 5-5; and

FIG. 6 is a fragmentary exploded perspective view of a modified form ofair-conditioner enclosure in accordance with this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT evaporator 10, blowers 11 and12, blower drive motor 13, and electrical control assembly 14. Thechassis 3 is a one-piece molded structure of fiberglass reinforcedplastic or other suitable plastic having a pair of laterally spaced sidewalls 15 and 16 with a firewall 17 extending therebetween intermediatethe ends of the side walls,

and a floor member 18 which also acts as a corrosion resistant water panextending rearwardly from the firewall 17 between the side walls 15 and16. Intermediate the ends of the side walls 15 and 16 forwardly of thefirewall 17, there are integral vertical steps 19 and 20 which areabutted against the wall of a building when the assembled unit is placedwithin an opening therein.

In FIG. 2 there is shown a typical installation of the air-conditioningunit 2 in the outer wall 21 of a building which may consist of an outerfacing material 22, an inner masonry material 23 and an interior facingmaterial 24. The opening 25 in the outer wall 21 is desirably lined witha plastic or metal sleeve 26 which receives the air-conditioning unit 2except for the portion forwardly of the steps 19 and 20 which contactthe interior facing material 24 and determine the extent to which theforward part of the air-conditioner unit extends into the room. Thestepped surfaces 19 and 20 may be provided with a sealing material suchas styrofoam or other polyfoam material to provide a good seal aroundtheperiphery of the opening. Because the steps 19 and 20 are integral withthe chassis 3, they provide a strong and aesthetically attractive designwhich greatly simplifies the assembly of the air-conditioning unitwithin the wall opening by eliminating the angle members of conventionalair-conditioner housing ordinarily used for that purpose;

The floor member 18 in the rear portion of the chassis 3 has integralmounting bosses 27 adjacent one side wall 15 for supporting andattaching the compressor motor 6 thereto (see FIG. 1). Also integralwith the floor member 18 adjacent the rear face of the firewall 17intermediate the side walls 16 and 17 are a pair of raised pedestals 28which provide an elevated support station for supporting the condenserfan motor cradle 29 as shown in FIGS. 1, 4 and 5. Rearwardly of theraised pedestals is the lower half 30 of a fan cowling 31 which is alsodesirably integral with the floor member 18.

Integral with the rear edge of the floor member 18 is an upwardlyprojecting flange 32 (see FIG. 4) which permits the floor member to beused as a water pan and also provides a mounting surface for attachementof the condenser 7 to the rear end of the chassis 3. As clearly shown inFIGS. 4 and 5, the floor member 18 has a channel or groove 33 to collectthe evaporator and condenser water for easy pickup by a slinger ring 34mounted on the condenser fan 8 and extending into the groove 33. As thewater is lifted out of the groove 33 by the slinger ring 34, it is blownacross the condenser coils to improve the operational efficiency of theunit.

Integral with the firewall 17 and extending forwardly therefrom betweenthe side walls 15 and 16 is an interior wall 35 which defines with thefirewall and spaced apart side walls two compartments 36 and 3'7, thelargest of which (compartment 36) receives the blowers 11 and 12 andblower drive motor 13 as well as the evaporator 10, and the smallest ofwhich (compartment 37) receives the electrical control assembly 14 thusisolating and insulating the electrical controls from the rest of theunit for safety purposes.

Within the larger compartment 36 are the blower housings 38 and 39, theupper halves 40 of which are desirably molded integral with the chassis3. The back edges of the upper blower housing halves 40 are bothintegral with the firewall 17 and one end of one upper blower housinghalf is also integral with the interior wall 35 and the other end of theother upper blower housing half is integral with the side wall 16. Theupper blower housing halves 40 are also desirably connected together atthe middle by a blower motor suspension platform 41 molded integral withthe firewall 17 and with the upper blower housing halves 40. A moldedbar 42, integral with the interior wall 35, upper blower housing halves40, suspension platform 41, and side wall 16 provides added strength.

As clearly shown in FIGS. 1, 3 and 4, the upper blower housing halves 40are horizontally oriented semi-cylindrical envelopes provided with largeair discharge openings 45 in their upper surfaces. Surrounding thesemi-cylindrical envelopes of the upper blower housing halves 40 aredrain pan areas 46 which slope toward the corners 47 and 48 where theinterior wall 35 and outer wall 16 are connected to the firewall 17. Insuch corners 47 and 48 there are drain holes 49 extending through thefirewall 17 to provide for fast runoff of the evaporator condensate fromthe forward compartment tothe condenser drip pan 18 at the rear of theunit. l,

The lower blower housing halves 50 are desirably molded as separateparts using a single mold cavity and attached to the upper blowerhousing halves 40 using suitable fasteners (see FIGS. 1 and 3). However,it should be understood that the lower blower housing halves 50 could bemolded as a single piece if desired, and the upper blower housing halves40 with surrounding drain pan areas 46 could also be molded as a singlepiece'separately from the chassis 3 and subsequently attached to thechassis using suitable fasteners if desired.

The suspension platform 41 is provided with suitable mounting bosses tofacilitate attachment of a bracket 51 for the blower drive motor 13 tothe bottom side of the suspension platform, after which the blowers 11and 12 may be positioned within the upper blower housing halves 40 andcompletely enclosed by attachment of the lower blower housing halves 50to the upper blower housing halves 40 using suitable fasteners asaforesaid. A filter plate 52 may then be attached to the chassis 3beneath the blower housings to filter the air which is pulled into theunit bythe blowers.

Additional mounting bosses 53 are provided on the upper blower housinghalves 40 for attachment of evaporator mounting brackets 54 theretowhich support the evaporator at an angle above the blower dischargeopenings 45 for passage of the circulated room air therethrough. Asuitable heating element 55 may also be mounted above the evaporator 10using suitable brackets 56 for heating the room with the unit duringcold weather if desired. A guard screen 57 may also be placed over thetop of the heating element 55 for safety.

Preferably, a portion of the upper edge 58 of the interior wall 35 ismade to slope downwardly as shown to provide adequate clearance betweenthe evaporator 10 and interior wall for passage of wires leading fromthe electrical control assembly 14 to the various electrical components,and notches 59 are also desirably provided in the upper edge 60 of thefirewall 17 for passage of wires between the front and rearcompartments.

The top cover 4 may be secured to the top of the chassis 3 usingsuitable fastening means such as pins or screws extending through thetop cover into holes provided in strengthened sections along the upperedge of the side walls of the chassis. The top cover 4 may also includea cut-out section 61 for positioning of a louvered section 62 thereindirectly above the evaporator 10 and heating element 55, or the louveredsection may be made integral with the top cover. Also integral with thetop cover 4 is the upper half 63 of the fan cowling 31 which extendsvertically downwardly therefrom and mates with the lower half 30 of thefan cowling extending upwardly from the floor member 18 as aforesaid. Adownwardly extending lip 64 on the forward edge of the top cover 4overlaps the front edge of the guard screen 57 as shown in FIG. 4.

Although it is preferred that the top cover 4 be aielatively flat andthin member to facilitate attachment to the chassis 3, it will beapparent that the chassis 3 may be split anywhere along its height andthe remainder of the side walls 15 and 16' and firewall 17 may be madeintegral with the top cover 4' if desired as shown in FIG. 6. Otherwise,the details of construction of the enclosure l' of the FIG. 6 embodimentmay be substantially identical to the enclosure 1 previously described,and the same reference numbers followed by a prime symbol are used todesignate like parts. The front cover 5 may also be attached to thefront edges of the chassis 3 using suitable fasteners and decorated inany suitable manner as by attaching wood grain strips 65 or the likethereto.

Both the top cover 4 and front cover 5, like the chassis 3, may be madeby known molding techniques from suitable plastic material to form rigidstructural corrosion resistant parts which provide substantial economiesin manufacturing costs with little or no maintenance required, and theparts may also be decoratively molded to provide an attractiveappearance without the need for additional decorative covers.

The embodiments of the invention in which an exclusive property orprivilege is claimed are defined as follows:

1. An enclosure for air-conditioners and the like comprising a one-piecemolded chassis having a pair of laterally spaced side walls, an integralfire wall extending between said side walls intermediate the endsthereof defining separate compartments on opposite sides of said firewall, a floor member extending between said side walls on the rear sideof said fire wall providing a drain pan area, said floor member beingintegral with said side walls and said fire wall, at least one blowerhousing forwardly of said fire wall, and a horizontal suspensionplatform integral with said fire wall and extending forwardly therefromfor mounting of a blower motor, said blower housing having an airdischarge opening in its upper surface, means for mounting an evaporatorabove said blower housing and horizontal suspension platform, saidblower housing and horizontal suspension platform being shaped toprovide a drain pan area surrounding said air discharge opening, and adrain hole in said fire wall providing communication between said drainpan areas on opposite sides of said fire wall, said drain pan areasurrounding said air discharge opening being sloped to provide fastrunoff of condensate forwardly of said fire wall to the rear thereof,said blower housing comprising upper and lower halves, one of saidblower housing halves being integral with said fire wall and with saidhorizontal suspension platform.

2. The enclosure of claim 1 wherein there are a pair of said blowerhousings forwardly of said fire wall, each comprising upper and lowerhalves, with air discharge openings in the upper halves thereof, saidhorizontal suspension platform being disposed between said blowerhousings and integral with one half of each of said blower housings,both of said blower housings and horizontal suspension platformtherebetween being shaped to provide drain pan areas surrounding saidair discharge openings, and there are a plurality of drain holes in saidfire wall providing communication between said drain pan areas onopposite sides of said fire wall.

3. The enclosure of claim 2 wherein said drain pan areas surroundingeach of said air discharge openings slope away from each other towardopposite corners, and there are drain holes in said fire wall at saidopposite corners to provide fast run off of condensate forwardly of saidfire wall to the rear thereof as aforesaid.

4. The enclosure of claim 2 further comprising an interior wall integralwith said fire wall and extending forwardly therefrom between said sidewalls, said interior wall providing a pair of spaced apart compartmentsforwardly of said fire wall which are isolated and insulated from eachother, one of said compartments containing said blower housings, and theother compartment being adapted to receive the electrical controls forvarious components, one half of each of said blower housings also beingintegral with said interior wall and one of said side walls,respectively.

5. The enclosure of claim 4 further comprising notches in the upper edgeof said fire wall for passage of electrical wires leading from theelectrical controls to various electrical components.

6. The enclosure of claim 4 wherein the upper edge of said interior wallis sloped downwardly to provide a clearance between the evaporator andinterior wall for passage of electrical wires leading from theelectrical controls to various electrical components.

7. The enclosure of claim 6 further comprising mounting brackets forsupporting the evaporator at an angle above said blower housings andhorizontal suspension platform.

8. The enclosure of claim 1 further comprising means for mounting aheater element above the evaporator.

9. The enclosure of claim 4 further comprising a bar integral with theforwardmost portions of said blower housings and suspension platform forincreased strength, the ends of said bar also being integral with saidinterior wall and said one side wall, respectively.

ill. The enclosure of claim 1 further comprising separate top and frontcovers adapted to be attached to the top and front edges, respectively,of said enclosure, said top and front covers and said enclosure beingmolded from plastic material to provide a rigid, corrosion resistantassembly.

111. The enclosure of claim 10 wherein said plastic is a fiberglassreinforced plastic.

12. The enclosure of claim 1 wherein said side walls include avertically extending step forwardly of said fire wall facing rearwardlyfor abutting engagement with a wall when said enclosure is inserted intoan opening therein.

13. The enclosure of claim 12 wherein said opening is lined with aplastic sleeve.

14. The enclosure of claim 1 further comprising mounts integral withsaid floor member for mounting of compressor and condenser motorsrearwardly of said fire wall, and a groove in said floor member forcollecting condensate, said condenser motor having a fan with a slingerring adapted to extend into said groove for picking up the condensate insaid groove and blowing the condensate across a condenser adapted to bemounted at the rear of said enclosure.

15. The enclosure of claim 14 wherein the lower half of a fan cowling isintegral with said floor member, and the upper half of said fan cowlingis integral with a onepiece molded cover member adapted to be attachedto the upper edges of said enclosure.

16. An enclosure for air-conditioners and the like comprising aone-piece molded chassis having a pair of laterally spaced side walls,an integral fire wall extending between said side walls intermediate theends thereof defining separate compartments on opposite sides of saidfire wall, a floor member extending between said side walls on the rearside of said fire wall providing a drain pan area, said floor memberbeing integral with said side walls and fire wall, an interior wallintegral with said fire wall and extending forwardly therefrom betweensaid side walls, said interior wall providing a pair of spaced apartcompartments forwardly of said fire wall which are isolated andinsulated from each other, one of said compartments forwardly of saidfire wall containing blower housings, and the other compartmentforwardly of said fire wall being adapted to receive the electricalcontrols for various components, said blower housings comprising upperand lower halves, said upper halves being integral with said fire walland said interior wall and one of said side walls and having airdischarge openings in their upper surfaces, and a horizontal suspensionplatform between said blower housings for mounting of a blower motor,said horizontal suspension platform being integral with said fire walland said upper halves of said blower housings, means for mounting anevaporator above said blower housings and horizontal suspensionplatform, said blower housings and horizontal suspension platform beingshaped to provide drain pan areas surrounding said air dischargeopenings, and drain holes in said fire wall providing communicationbetween said drain pan areas on opposite sides of said fire wall, saiddrain pan areas surrounding said air discharge openings being sloped toprovide fast run off of condensate from the forward side of said firewall to the rear side thereof, and separate one-piece top and frontcovers adapted to be attached to the top and front edges, respectively,of said enclosure, said top and front covers and said enclosure beingmolded from plastic material toprovide a rigid, corrosion resistantassembly.

l =l i i

1. An enclosure for air-conditioners and the like comprising a one-piecemolded chassis having a pair of laterally spaced side walls, an integralfire wall extending between said side walls intermediate the endsthereof defining separate compartments on opposite sides of said firewall, a floor member extending between said side walls on the rear sideof said fire wall providing a drain pan area, said floor member beingintegral with said side walls and said fire wall, at least one blowerhousing forwardly of said fire wall, and a horizontal suspensionplatform integral with said fire wall and extending forwardly therefromfor mounting of a blower motor, said blower housing having an airdischarge opening in its upper surface, means for mounting an evaporatorabove said blower housing and horizontal suspension platform, saidblower housing and horizontal suspension platform being shaped toprovide a drain pan area surrounding said air discharge opening, and adrain hole in said fire wall providing communication between said drainpan areas on opposite sides of said fire wall, said drain pan areasurrounding said air discharge opening being sloped to provide fastrun-off of condensate forwardly of said fire wall to the rear thereof,said blower housing comprising upper and lower halves, one of saidblower housing halves being integral with said fire wall and with saidhorizontal suspension platform.
 2. The enclosure of claim 1 whereinthere are a pair of said blower housings forwardly of said fire wall,each comprising upper and lower halves, with air discharge openings inthe upper halves thereof, said horizontal suspension platform beingdisposed between said blower housings and integral with one half of eachof said blower housings, both of said blower housings and horizontalsuspension platform therebetween being shaped to provide drain pan areassurrounding said air discharge openings, and there are a plurality ofdrain holes in said fire wall providing communication between said drainpan areas on opposite sides of said fire wall.
 3. The enclosure of claim2 wherein said drain pan areas surrounding each of said air dischargeopenings slope away from each other toward opposite corners, and thereare drain holes in said fire wall at said opposite corners to providefast run off of condensate forwardly of said fire wall to the rearthereof as aforesaid.
 4. The enclosure of claim 2 further comprising aninterior wall integral with said fire wall and extending forwardlytherefrom between said side walls, said interior wall providing a pairof spaced apart compartments forwardly of said fire wall which areisolated and insulated from each other, one of said compartmentscontaining said blower housings, and the other compartment being adaptedto receive the electrical controlS for various components, one half ofeach of said blower housings also being integral with said interior walland one of said side walls, respectively.
 5. The enclosure of claim 4further comprising notches in the upper edge of said fire wall forpassage of electrical wires leading from the electrical controls tovarious electrical components.
 6. The enclosure of claim 4 wherein theupper edge of said interior wall is sloped downwardly to provide aclearance between the evaporator and interior wall for passage ofelectrical wires leading from the electrical controls to variouselectrical components.
 7. The enclosure of claim 6 further comprisingmounting brackets for supporting the evaporator at an angle above saidblower housings and horizontal suspension platform.
 8. The enclosure ofclaim 1 further comprising means for mounting a heater element above theevaporator.
 9. The enclosure of claim 4 further comprising a barintegral with the forwardmost portions of said blower housings andsuspension platform for increased strength, the ends of said bar alsobeing integral with said interior wall and said one side wall,respectively.
 10. The enclosure of claim 1 further comprising separatetop and front covers adapted to be attached to the top and front edges,respectively, of said enclosure, said top and front covers and saidenclosure being molded from plastic material to provide a rigid,corrosion resistant assembly.
 11. The enclosure of claim 10 wherein saidplastic is a fiberglass reinforced plastic.
 12. The enclosure of claim 1wherein said side walls include a vertically extending step forwardly ofsaid fire wall facing rearwardly for abutting engagement with a wallwhen said enclosure is inserted into an opening therein.
 13. Theenclosure of claim 12 wherein said opening is lined with a plasticsleeve.
 14. The enclosure of claim 1 further comprising mounts integralwith said floor member for mounting of compressor and condenser motorsrearwardly of said fire wall, and a groove in said floor member forcollecting condensate, said condenser motor having a fan with a slingerring adapted to extend into said groove for picking up the condensate insaid groove and blowing the condensate across a condenser adapted to bemounted at the rear of said enclosure.
 15. The enclosure of claim 14wherein the lower half of a fan cowling is integral with said floormember, and the upper half of said fan cowling is integral with aone-piece molded cover member adapted to be attached to the upper edgesof said enclosure.
 16. An enclosure for air-conditioners and the likecomprising a one-piece molded chassis having a pair of laterally spacedside walls, an integral fire wall extending between said side wallsintermediate the ends thereof defining separate compartments on oppositesides of said fire wall, a floor member extending between said sidewalls on the rear side of said fire wall providing a drain pan area,said floor member being integral with said side walls and fire wall, aninterior wall integral with said fire wall and extending forwardlytherefrom between said side walls, said interior wall providing a pairof spaced apart compartments forwardly of said fire wall which areisolated and insulated from each other, one of said compartmentsforwardly of said fire wall containing blower housings, and the othercompartment forwardly of said fire wall being adapted to receive theelectrical controls for various components, said blower housingscomprising upper and lower halves, said upper halves being integral withsaid fire wall and said interior wall and one of said side walls andhaving air discharge openings in their upper surfaces, and a horizontalsuspension platform between said blower housings for mounting of ablower motor, said horizontal suspension platform being integral withsaid fire wall and said upper halves of said blower housings, means formounting an evaporator above said blower housings and horizontalsuspension platform, saiD blower housings and horizontal suspensionplatform being shaped to provide drain pan areas surrounding said airdischarge openings, and drain holes in said fire wall providingcommunication between said drain pan areas on opposite sides of saidfire wall, said drain pan areas surrounding said air discharge openingsbeing sloped to provide fast run off of condensate from the forward sideof said fire wall to the rear side thereof, and separate one-piece topand front covers adapted to be attached to the top and front edges,respectively, of said enclosure, said top and front covers and saidenclosure being molded from plastic material to provide a rigid,corrosion resistant assembly.